Chronicling the audacious acts of a group of organized undocumented youth prior to the Obama-implemented, temporary relief known as DACA (Deferred Action for Childhood Arrivals), “The Infiltrators,” from Latinx directors Alex Rivera and Cristina Ibarra, is a vital piece of hybrid cinema that shines light into the obscure realm of privately-operated immigration detention facilities. The timely film world premiered Friday night at the Sundance Film Festival.